title: Variant Richter's syndrome: a rare case of classical Hodgkin's lymphoma developing in a patient with chronic lymphocytic leukemia treated with fludarabine.
mesh_terms: D000970:Antineoplastic Agents / Q000627:therapeutic use; D018906:Antineoplastic Agents, Alkylating / Q000627:therapeutic use; D001706:Biopsy; D001853:Bone Marrow / Q000473:pathology; D003520:Cyclophosphamide / Q000627:therapeutic use; D018450:Disease Progression; D006689:Hodgkin Disease / Q000175:diagnosis* / Q000473:pathology*; D006801:Humans; D015451:Leukemia, Lymphocytic, Chronic, B-Cell / Q000188:drug therapy*; D008198:Lymph Nodes / Q000473:pathology; D008207:Lymphatic Metastasis; D008297:Male; D008875:Middle Aged; D016609:Neoplasms, Second Primary / Q000175:diagnosis* / Q000473:pathology*; D013577:Syndrome; D013997:Time Factors; D014740:Vidarabine / Q000031:analogs & derivatives* / Q000627:therapeutic use*
chemical_list: D000970:Antineoplastic Agents; D018906:Antineoplastic Agents, Alkylating; D003520:Cyclophosphamide; D014740:Vidarabine; C024352:fludarabine